As a final step you might want to change the default name of the tab link on the left navigation to something other than the default “Welcome”

Alternatively you might want to link out to content rather than embedding it. I suggest you use the editor in the app to upload a static imagine, and then assign it a hyperlink that takes users to the page you desire. An example of this can be seen here: link out to youtube

I reiterate that this particular app is one of many, with more being added everday.Conceptually they are all similar in that they provide a means for you to create an iframe and configure the content.

You can multiple instances of the app to create multiple tabs on your left navigation. This allows you to build a mini-website on your facebook fanpage.

It is all very intuitive. Play with it and have fun!!!.

Stay tuned for a post on using WordPress to build interactive Facebook pages.